On just two points:
Wait, first you say a person of age 15 can’t have the capability to make such a solid decision in their life, then saying you are not telling anyone what they are capable of? I agree, the individual mental evolution has the capacity to cause change in one’s life path, but to require the change I disagree with. Another time we will continue to look at this train of thought differently.
As Vallikat said, it's a question of developement of the brain, and for a 15-year-old to have a fully developed brain is as likely as a 6-year-old going through puberty. Could happen, but HIGHLY unlikely. And the difference in "capable" is more short-term vs. long-term. The young mind is capable of making a decision. The young mind is not capable of making a decision and enforcing a stay on that decision for the remainder of life unless at least one of two situations apply: 1) The decision is based on trauma and leads to a comfort zone that does not require effort beyond the initial decision (see: imancipation), or 2) The decision is based on genetic influence (see: parentally influenced career path). But yes, the young mind has the chance to make a decision and there is a chance that the person will stick to that goal throughout life, but again this is HIGHLY unlikely and not at all based on the resolve of the mind, but rather based on the very slim chance that the mind's evolution will not involve a major change in life paths. That's short-term vs long-term capability, two different concepts used here, with a vast majority of human examples to confirm it's general truth.
I believe you and I have different perceptions and understandings of what the meaning of the word rich is. This is where in my opinion you fall into the same trap you warn others not to do by following the media’s standard for what being rich means. But, as you and I both have proven, we all have opinions and none of them are less valid then the next. Only difference is how we came to those opinions and how they shape our lives.
I don't like to think that I fall into the trap so much as assume that anyone else may have. Although I do quite often refer to myself as a child of the media. I, like most others, spent a good majority of my childhood influenced by contemporary media and commercialism. When I shunned that completely and went about creating my own version of filtered contemporary media (GSP), I realized that redefining a term to fit my own path when it's generally accepted meaning is totally different is not an easy path to follow. Therefore: rich means money value unless pointed out otherwise in context.
Pure semantics, I know, but isn't that what debates always filter down to? LOL very good discussion, Mire.
I just know there are times my thoughts are not really put across very well over this medium 
